static tux_req_t * get_cachemiss (iothread_t *iot)
{
struct list_head *tmp;
tux_req_t *req = NULL;
spin_lock(&iot->async_lock);
if (!list_empty(&iot->async_queue)) {
tmp = iot->async_queue.next;
req = list_entry(tmp, tux_req_t, work);
Dprintk("get_cachemiss(%p): got req %p.\n", iot, req);
list_del(tmp);
DEBUG_DEL_LIST(tmp);
iot->nr_async_pending--;
DEC_STAT(nr_cachemiss_pending);
if (req->ti->iot != iot)
TUX_BUG();
}
spin_unlock(&iot->async_lock);
return req;
}
/*
* Return 1 if the output space condition went away
* before adding the handler.
*/
int add_output_space_event (tux_req_t *req, struct socket *sock)
{
struct sock *sk = sock->sk;
/*
* blocked due to socket IO?
*/
spin_lock_irq(&req->ti->work_lock);
add_keepalive_timer(req);
if (test_and_set_bit(0,&req->wait_output_space))
TUX_BUG();
INC_STAT(nr_output_space_pending);
if ((sk->sk_state == TCP_ESTABLISHED) && enough_wspace(sk)) {
if (test_and_clear_bit(0, &req->wait_output_space)) {
DEC_STAT(nr_output_space_pending);
del_keepalive_timer(req);
spin_unlock_irq(&req->ti->work_lock);
return 1;
}
}
spin_unlock_irq(&req->ti->work_lock);
return 0;
}
